Rotary reciprocating knife for smoothing staves



' UNITED sTATEs PATENT oEEIcE. f

WM'. B. DUNNING, OF GENEVA, NEW YORK.

ROTARY REcrPRocATING KNIFE FOR sMooTI-IING sTAvEs.

Specification of Letters Patent No. 19,760, dated March 30, 1858.

To all whom it may concern.'

Be it known that I, VVILLTAM B. DUNNING, of Geneva, in the county ofOntario and State of New York, have invented certain new and usefulImprovements in Machinery for Manufacturing vStaves; and I do herebydeclare and ascertain the same as follows, reference being had to theaccompanying drawings, illustrative thereof.

In constructing my new stave machine I build a substitute frame of woodor any other suitable material, the general form of which is shown inFigure 1, A being the front and E the rear end thereof. The size andproportions of this frame depend somewhat upon the size and length ofstaves which the machine is calculated to make. In this frame I suspendthe rock shaft B, on which I attach the arms C 0, and at a properdistance therefrom I attach the arms D D. The arms C, 'C, have shortarms projecting from their outer'ends, standing out toward the front endof the machine and at right angles with the main arms C C. To these armsI attach the cutting saws Gr G, each saw having been previously bentinto the form of a half circle, the diameter of which circle shouldcorrespond with the diameter of the article for which the staves aredesigned. On the arms D, D I attach the circular rims H H AH H and tothese rims are attached the smoothing cutters I, L I, I. These cuttersare located at suc a distance from the main rock shaft B as tocorrespond in that respect with the position of the cutting saws G, Gand allow the staves to pass directly from the saws through the saidsmoothing cutters, the stave being carried along by the feed rollersMSK, 44K, 44K, Kn which may be m? tuated by any convenient mechanism forthat purpose. An oscillating movement is given to the cutting saws andsmoothing cutters by means of a shaft passing along on one side of themain frame as seen at L on which a crank M (or eccentric) is located andfrom which a pitman N eX- tends to and connects with one of the arms onthe main rock shaft, or to a separate arm attached thereto for thatpurpose. This crank shaft may be revolved by a band or otherwise, andthe pitman being connected with the rock shaft at a greater distancefrom its center than the length of the crank M, would cause the cuttingtools to 'oscilf late in the arc of a circle and the range of thisoscillating movement can bevaried by varying the point of attachment ofthe pitmanon the arm as described and a dierent speed in the movement ofthe cutting saws and smoothing cutters may be attained by placing themon two separate shafts, (or having onevof them loose on the same shaft)and using two pitmen to drive them.

A feed table is arranged opposite to each saw as seen at O O to carrythe plank from which the staves are to be cut, and the staves when cutentirely oil7 by the cutting saws, are carried along through thesmoothing cutters by the feed rollers as above de scribed.

By this arrangement and construction of a stave machine very narrow sawsmay be used and `consequently the stuff .may be easily and accuratelyguided, as there is little or no tendency to deviate from a straightline in its unobstructed passage through the machine, and greatdurability of the saws is insured by their attachment at each end and soInearly on aline with the point of cutting.

The quality of the work done by this machine is superior because thecutting saws are so secured as to work almost entirely free from thevibration and crowding of the long revolving cylinder saws heretoforeused for this purpose and the staves are much smoother, being finishedby additional cutters having the movement and in the same (or nearly thesame) curve given them by the cutting saws-so that withoutrehandling-the stuff may be converted into smooth and perfect staves byone process.

The machine as above described and shown in the drawings, represents adouble set of cutting saws and smoothing-cutters worked from the sameshaft, so that two staves may be made at the same timebut if desired themachine may be made with only one saw and a corresponding pair ofsmoothing cutters so as to make but one stave at once. however, moreeconomical, for ordinary purposes, to run the machine with double setsof smoothing cutters and corresponding saws as one attendant can therebycut two staves at once.

In vlarge machines for staves of great length, the cutting saws may beattached to one shaft, and the smoothing cutters entirely It isvindependent on another shaft on the same frame, or if desired they couldbe located on separate frames, but the necessity for such arrangementmay be seldom realized-because the cutting savvsvmay be so cheaply madethat several sets of different diameters may be fitted to the samemachine and by constructing the feed tables so as to admit of a lateraladjustment and providing additional sets of rims for the smoothingcutters Whose diameters correspond to the dierent sets of cuttingsaws-the machine would admit of a complete and easy adjustment for themanufacture of differently proportioned staves.

In testimony whereof I have hereunto set my hand. l

- WM. B. DUNNING.

Witnesses:

GEO. R. DUSINBERBE, MORRIS W. HERNNIP.

